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單項選擇題

A user is reporting a loud grinding sound when the machine is powered on. The machine loadsinto windows and the user does not notice any performance issues. Which of the following is the MOST likely cause of the noise?（）

A.Powersupplyfailure
B.BadHD
C.Badfan
D.FaultyCD-Rom

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單項選擇題

A display on a laptop has become very dim, almost unable to be seen. Which of the followingcomponents is the MOST likely cause of this problem?（）

A. Video card
B. Inverter board
C. AC adapter
D. Processor

單項選擇題

Which of the following processor specifications should be used to reduce power consumption?（）

A.45W
B.65W
C.75W
D.95W